106 lines
3.2 KiB
Java
106 lines
3.2 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.tomcat.dbcp.dbcp2;
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import java.lang.management.ManagementFactory;
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import java.util.Objects;
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import javax.management.MBeanServer;
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import javax.management.MalformedObjectNameException;
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import javax.management.ObjectName;
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import org.apache.juli.logging.Log;
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import org.apache.juli.logging.LogFactory;
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/**
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* Internal wrapper class that allows JMX to be a noop if absent or disabled.
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*
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* @since 2.2.1
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*/
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class ObjectNameWrapper {
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private static final Log log = LogFactory.getLog(ObjectNameWrapper.class);
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private static MBeanServer MBEAN_SERVER = getPlatformMBeanServer();
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private static MBeanServer getPlatformMBeanServer() {
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try {
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return ManagementFactory.getPlatformMBeanServer();
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} catch (LinkageError | Exception e) {
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// ignore - JMX not available
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log.debug("Failed to get platform MBeanServer", e);
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return null;
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}
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}
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public static ObjectName unwrap(final ObjectNameWrapper wrapper) {
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return wrapper == null ? null : wrapper.unwrap();
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}
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public static ObjectNameWrapper wrap(final ObjectName objectName) {
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return new ObjectNameWrapper(objectName);
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}
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public static ObjectNameWrapper wrap(final String name) throws MalformedObjectNameException {
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return wrap(new ObjectName(name));
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}
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private final ObjectName objectName;
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public ObjectNameWrapper(final ObjectName objectName) {
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this.objectName = objectName;
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}
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public void registerMBean(final Object object) {
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if (MBEAN_SERVER == null || objectName == null) {
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return;
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}
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try {
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MBEAN_SERVER.registerMBean(object, objectName);
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} catch (LinkageError | Exception e) {
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log.warn("Failed to complete JMX registration for " + objectName, e);
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}
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}
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/**
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* @since 2.7.0
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*/
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@Override
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public String toString() {
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return Objects.toString(objectName);
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}
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public void unregisterMBean() {
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if (MBEAN_SERVER == null || objectName == null) {
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return;
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}
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if (MBEAN_SERVER.isRegistered(objectName)) {
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try {
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MBEAN_SERVER.unregisterMBean(objectName);
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} catch (LinkageError | Exception e) {
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log.warn("Failed to complete JMX unregistration for " + objectName, e);
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}
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}
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}
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public ObjectName unwrap() {
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return objectName;
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}
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}
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